System of electrical distribution



y T. w. DRURY 2,040,688

SYSTEM OF ELECTRICAL DISTRIBUTION Filed Nov. 5, 1931 THoMAsWDRuRx N LNTOK ATTORNILS 4 .distributi Patented May 12, 1936 UNITED STATES.

PATENT OFFICE 2,040,688 SYSTEM or ELECTRICAL ms'mmurron Thomas W. Drury, Bronson,

Harry A, Application November 5,

This invention relates to systems Other objects the invention drawing forming a part thereof and showing one embodiment of the invention, and all theseinovel features are intended to be pointed out in the claims. r The single figure of the drawing is a diagrammatic showing of a system 01' distribution embodying the invention.

Referring to the drawing, conductors I and 2 may be connected to a source of direct current (not shown). The conductors L and 2 are connected to any suitable means3 'for transforming the direct current supplied by the source into an nected respectively to a resistor radio apparatus.

Mich, minor to Douglas, Bronson, Mich.

1931, Serial No." 573,148

- 6 Claims- (Cl. 171-97) in any suitable manner by armature 8 contact with contact will be in engagement with connals of the a reactor-29 tothe tap 24.

As indicated on the drawing the tap connected to the negative terminal oi the connections of radio apparatus while the terminals 26,- 25, and 24 maybe connected respectively to the 45, 90, and. 180 radio apparatus. I1 the radio apparatus utilizes negative biasing means, the te g8 may be connected to a so-called C oi the volt te minals of the I'Iinaybe In order to smooth out anyundulaticns which are provided for bucklngout and filtering such undulati oi which means the reactor 29 hereinbeforeareferred to is a part.

ll, one terminal of which is connected by a conductor II to the conductor 22 .on the side of the reactor ll'connected to the electron discharge device. The other terminal of the condenser 3| is connected by a conductor 34 to the conductor 2|. Another condenser 30 has one terminal con- The conductor 2! may be grounded as indicat- I ed at ll.

I have found that good results are obtained by using a reactor 2! having an inductance of 20 henries, while the condensers 30 and Il may have a capacity of eight microfarads each and the condensers 35 and 36 may have a capacity of 250 milli-microfarads each, and the resistor 23 may have a resistance of 15,000 ohms. It is to be understood that while I have given these values as providing a satisfactory performance, I do not limit myself to such values.

The operation of the system in the illustrated embodiment is as follows: the conductors I and I behig connected to a supply of direct current, the device I is set into operation and since this device acts to alternately supply the primary It with current flowing first in one then in the other, an alternating flux is set up in the core of the transformer II which induces an alternating electromotive force in the windings N and I5 respectively. The filament 20 is heated and electrons are given off thereby in the well supplied by the verted into, and delivered to the conductors ii and 22, as a unidirectional electromotive force. This electromotive force may be somewhat undulating in character and it is therefore not delivered directly to the terminals 24 and 18, of the resistor 23. By reason of the filtering and by-passing action of the condensers 38, ll, 35 and 30 in conjunction with the choking action of reactor 2!, the'electromotive forces between the various taps on the resistor 23 is non-undulating, 1

-It will be obvious to those skilled in the art that the embodiment of my invention herein shown and described may be variously changed, used, or modified, all without departing from the spirit of my invention or sacrificing the'ad-.

vantages thereof, and it therefore will be understood that the disclosure herein is illustrative only, that my invention embodies advantages and uses other than those particularly pointed out or suggested herein, and that my invention is not limited thereto.

I claim:

1. Ian system of distribution, as for radioapparatus, adapted to be fed from a source of direct current; a step-up transformer having primary and secondary windings; means for in rapid sueoession alternately connecting the terminals of said primary winding to'said source and then reversing said connections; means for rectifydirection and -ed thereto in the nected to said cathode and the mid-point of said 2,040,688 To the end stated there is provided a condenser ing the alternating potential produced in said secondary winding; and said rectifying means including an electron discharge device having anodes, connected respectively to the terminals of said secondary winding, a cathode, and output conductors connected to said cathode and the mid-point of said secondary winding.

2. In combination: a transformer having primary and secondary windings; a pair of vibratory contacts; a pair of relatively stationary contacts disposed on opposite sides of one of said vibratory contacts; a second pair of relatively stationary contacts disposed on opposite sides of the other of said vibratory contacts; means for connecting said vibratory contacts and said relatively stationary contacts to said source of direct current and to said primary winding so that vibration of said vibratory contacts causes said source of direct current to be successively connected to said primary winding, disconnected therefrom, connected thereto in the reverse direction, and disconnected therefrom; means for rectifying the alternating potential produced in said secondary winding, said rectifying means including output conductors one of which is connected to the mid-point. of said secondary winding.

3. In a system, as for radio apparatus, adapted to be fed from a source of direct current: a stepup transformer having primary and secondary windings; a pair of vibratory contacts; a pair of relatively stationary contacts disposed on opposite sides of one of said vibratory contacts; a second pair of relatively stationary contacts disposed on opposite sides of the other of said vibratory contacts; means for connecting said vibratory contacts and said relatively stationary contacts to said source of direct current and to said primarywinding so that vibration of said vibratory contacts causes said source of direct current to be successively connected to said primary winding, disconnected therefrom, connected thereto in the reverse direction, and disconnected therefrom; means for rectifying the alternating potential produced in said secondary winding, said rectifying means including output conductors one of which is connected to the midmary and secondary windings; a source of direct r current; a pair of vibratory contacts; a pair of relatively stationary contacts disposed on opposite sides of one of said vibratory contacts; a second pair of relatively stationary contacts disposed on opposite sides of bratory contacts; means for connecting said vibratory contacts and said relatively stationary contacts to said source of direct current and to said primary winding so that vibration of said vibratory contacts causes said source of direct current to be successively connected to said primary winding, disconnected therefrom, connectreverse direction, and disconnected therefrom; means for rectifying the alternating potential produced in said secondary 6 winding; and said rectifying means including an electron discharge device having anodes connected respectively to the terminals of said secondary winding, a cathode, and output conductors consecondary winding.

5. In combination: a transformer having primary and secondary windings; means for in rapid succession alternately connecting the terminals of said primary winding to a source of 7 the other of said vi- 6 direct current and then reversing said connecrent-and then reversing said connections; and tlons; and means for rectifying the alternating means for rectifying the alternating potential potential produced in said secondary winding, produced in said secondary winding; and said said rectifying means including output conducrectifying means including an electron discharge 5 tors one of which is connected to the mid-point device having anodes connected respectively to 5 of said secondary winding. the terminals of said secondary winding, a cath- 6. In combination: a transformer having priode, and output conductors connected to said mary and secondary windings; means for in rapid cathode and the mid-point of said secondary succession alternately connecting the terminals i winding.

0 of said primary winding to a source of direct cur- THOMAS W. DRURY. 10 

